An illustration picture shows the login page of ChatGPT, an interactive AI chatbot model trained and developed by OpenAI, on its website in Beijing, China, March 9, 2023. Wu Hao, EPA-EFE PARIS — The AI models that power chatbots and other applications still have difficulty distinguishing between nonsense and natural language, according to a study released on Thursday. The researchers at Columbia University in the United States said their work revealed the limitations of current AI models and suggested it was too early to let them loose in legal or medical settings. They put nine AI models through their paces,...